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Are crystal always formed by ions?
No, not all crystals are formed by ions. Some crystals are formed by covalent bonds, where atoms share electrons, rather than by the attraction of ions. Additionally, some crystals can be formed by metallic bonds, where electrons are delocalized among a lattice of metal atoms.
What is transparency of pyroxene?
Pyrites are a class of minerals. Some people call them "fool's gold" because they sometimes look similar to gold, but they are not gold. Pyrite crystals are not transparent. They are opaque.
Are all mineral crystals are made of ions?
No, not all mineral crystals are made of ions. Some minerals are made up of covalent bonds or metallic bonds rather than ionic bonds. These different types of bonding arrangements can result in a variety of crystal structures within minerals.
Why is salt crystals stronger then sugar crystals?
Salt crystals are stronger than sugar crystals because the ionic bonds in salt are stronger than the covalent bonds in sugar. The ionic bonds in salt are formed between positively charged sodium ions and negatively charged chloride ions, creating a stronger bond overall compared to the covalent bonds between the atoms in sugar molecules. This difference in bond strength results in salt crystals being more stable and harder than sugar crystals.
Why are the physical properties of the noble gases similar to those of covalent molecular substances?
The physical properties of noble gases are similar to those of covalent molecular substances because both have weak intermolecular forces between their particles. Noble gases exhibit London dispersion forces due to temporary dipoles, while covalent molecules share electrons through covalent bonds, resulting in weak forces of attraction between molecules.
Why some crystals are opaque?
Thse crystals do not transmit light radiation.
What is the transparency of hematite?
crystals that ar opaque
What exists as covalent crystals in the solid state?
Diamond and silicon are examples of covalent crystals in the solid state. In covalent crystals, atoms are held together by strong covalent bonds, resulting in a network structure with high melting points and hardness.
Why are metallic crystals opaque while crystals like diamond are not?
Metallic crystals absorb light in the visible spectra, diamond crystal do not.
What forms crystals covalent or ionic?
Crystals can form from both covalent and ionic compounds. Covalent crystals are held together by covalent bonds, where atoms share electrons to form a stable structure. Ionic crystals are held together by ionic bonds, where oppositely charged ions attract each other to form a lattice structure.
Can you compare and contrast the 4 types of crystals?
Covalent, Metallic, and Ionic crystals have high melting points and densities, but molecular crystals tend to be soft and has a lower melting point. Covalent crystal=covalent bond and Ionic crystal=ionic bond.
What are some properties of covalent crystals?
Covalent crystals have strong covalent bonds between atoms, resulting in a hard and brittle structure. They have high melting and boiling points due to the strong bonds that hold the structure together. Covalent crystals are typically insulators and have low conductivity of heat and electricity.
An LCD monitor uses crystals that become opaque when what is applied?
phosphor
Can crystals ever be made out of covalent bonds or is it strictlly only ionic?
Crystals can be made from covalent bonds as well as ionic bonds. Covalent crystals are formed when atoms share electrons, creating a network of interconnected atoms with strong directional bonds. Diamond and quartz are examples of covalent crystals, while sodium chloride (salt) is an example of an ionic crystal.
Is atmosphere ionic or covalent molecules?
Covalent molecules with small amounts of argon which is monatomic. All molecules are covalent. Ionic compounds form crystals, not molecules.
Which type of bond forms compounds with distinctive shapes rather than forming massive crystals?
Covalent bond. Molecular compounds are formed by covalent bonds. Ionic bonds and metallic bonds form large crystal lattices (Some large crystals are covalent- like diamond)
What kind of chemical bond do crystals have?
Ionic compunds which are crystalline- have ionic bonds. Giant covalent can also be crystalline e.g. diamond and silica- these have covalent bonds. Molecular compounds crystallise - these have covalent bonds and the crystals are held together by van der waals forces. and sometimes by hydrogen bonds.
